ABUS Steel-O-Chain 5805C Chain Lock, 75 cm, Red | Bike lock with number code, 5 mm square chain, durable 2-component number rollers, special steel

Unfortunately the lock won't open after less than 3 months. I have no idea if it's jammed. I can't open it anymore.

After just five weeks of use, my eight‑year‑old daughter dropped the still‑locked padlock from about 30 cm high onto the floor – it shattered, no force or tool required! If the lock already falls apart just by looking at it, it’s useless for securing valuables. Amazon’s return period was already a w… Read more

We bought the castle for my son's children's bike. It should therefore be fairly light and not overly thick. It’s exactly what we need for our application.

As a combination lock, it's very handy because neither the adult nor the child can lose the key. It works flawlessly. The adjustment can be a bit fiddly at times.